Bump lycheeverse/lychee-action from 1.8.0 to 1.9.1 (#644)

Bumps [lycheeverse/lychee-action](https://github.com/lycheeverse/lychee-action) from 1.8.0 to 1.9.1.
- [Release notes](https://github.com/lycheeverse/lychee-action/releases)
- [Commits](lycheeverse/lychee-action@v1.8.0...v1.9.1)

---
updated-dependencies:
- dependency-name: lycheeverse/lychee-action
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/check-sphinx-and-links.yml

@@ -23,7 +23,7 @@ jobs:
 
     - name: Link Checker
       id: lc
-      uses: lycheeverse/lychee-action@v1.8.0
+      uses: lycheeverse/lychee-action@v1.9.1
       with:
         args: --verbose **/*.html
     - name: Fail if there were link errors